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Sounding Reference Signal patents



      
           
This page is updated frequently with new Sounding Reference Signal-related patent applications. Subscribe to the Sounding Reference Signal RSS feed to automatically get the update: related Sounding RSS feeds. RSS updates for this page: Sounding Reference Signal RSS RSS


Method and apparatus for configuring configuration information at user equipment in a mobile communication system

Method and device for channel estimation

Date/App# patent app List of recent Sounding Reference Signal-related patents
07/17/14
20140198701
 Deciding whether to send uplink control signaling based on the active time status of a user equipment configured with discontinuous reception (drx) patent thumbnailDeciding whether to send uplink control signaling based on the active time status of a user equipment configured with discontinuous reception (drx)
A method in a user equipment for deciding whether or not to send an uplink transmission (ie. Channel state information, csi, and/or sounding reference signal, srs) to a radio access network node (node b) is provided.
07/10/14
20140192736
 Method and apparatus for configuring configuration information at user equipment in a mobile communication system patent thumbnailMethod and apparatus for configuring configuration information at user equipment in a mobile communication system
A method for configuring configuration information with a user equipment in a mobile communication system is provided. The method includes determining, upon receipt of a physical uplink control channel/sounding reference signal (pucch/srs) release request from a lower layer, whether configuration information required for a transmission mode supporting coordinated multi-point (comp) has been configured, and if the configuration information has been configured, reconfiguring a setting state of the configuration information..
07/03/14
20140185486
 Method and device for channel estimation patent thumbnailMethod and device for channel estimation
The disclosure provides a method for channel estimation, including that: a small-scale fading channel of each carrier of each interfering channel is obtained respectively according to a gaussian distribution; a total interfering power pi of all interfering srss is calculated according to the obtained small-scale fading channel of each carrier of each interfering channel and a generated large-scale fading gain of each carrier of each interfering channel; interference-equivalent noise ni is calculated according to the total interfering power pi; and channel estimation is performed according to a sounding reference signal (srs) y received by an evolved node b (enb), wherein y is calculated with a formula y=sh+ni+n0. The disclosure further provides a device for channel estimation.
05/29/14
20140146777
 Method and apparatus for power control of sounding reference signal (srs) transmission patent thumbnailMethod and apparatus for power control of sounding reference signal (srs) transmission
Methods and apparatus for sounding reference signal (srs) power control for a wireless transmitter/receiver unit (wtru) are disclosed. These methods and apparatus include methods and apparatus for carrier-specific and carrier-common srs power control in wtrus that utilize carrier aggregation techniques.
05/15/14
20140133448
 Method and apparatus for uplink power control patent thumbnailMethod and apparatus for uplink power control
A method and apparatus for uplink power control, including: transmitting, by user equipment, a sounding reference signal (srs) to a network side according to a received triggering signal; receiving, by the user equipment, a path loss compensation value calculated based on the srs and transmitted by the network side; estimating, by the user equipment, a path loss value according to a received cell-specific reference signal (crs); and performing, by the user equipment, power compensation according to the path loss compensation and path loss values. On the basis of the original uplink power control performed according to the path loss estimated based on the downlink crss, the network side estimates the path loss compensation value of the ue by triggering the rrh ue to transmit aperiodic srss, and informs the ue in a semi-static manner, compensating for the inaccuracy of estimation of path loss and ensuring the efficiency of power control..
04/24/14
20140112168
 Enhanced srs transmission for mimo operation in lte-a patent thumbnailEnhanced srs transmission for mimo operation in lte-a
Enhanced sounding reference signal (srs) transmissions for multiple input, multiple output (mimo) operation are disclosed in which a user equipment (ue) detects an observed interference level for each receiver chain of the ue. In response to an imbalance, the ue precodes a srs targeting downlink operation to indicate the imbalance.
04/17/14
20140105189
 Method and apparatus for transmitting and receiving different signal types in communication systems patent thumbnailMethod and apparatus for transmitting and receiving different signal types in communication systems
A method and apparatus are provided for transmitting a reference signal (rs) by a user equipment (ue) in a wireless communication system. The method includes transmitting a demodulation reference signal (dm rs) and information data in a sub-frame; and transmitting a sounding reference signal (srs) in a last symbol in another sub-frame.
04/10/14
20140098837
 Antenna selection with frequency-hopped sounding reference signals patent thumbnailAntenna selection with frequency-hopped sounding reference signals
A transceiver has a first antenna and a second antenna for transmitting alternatively a frequency-hopped sounding reference signal (srs) over a sub-band of a bandwidth at a time. The transceiver includes a determination unit for determining whether a number of sub-bands in the bandwidth is odd or even, a transmitter for transmitting the srs continuously from the first antenna, if the number of sub-bands is even, and a receiver for receiving a response to the transmitting..
04/10/14
20140098696
 Combining channel quality measurements based on sounding reference signals and demodulation reference signals patent thumbnailCombining channel quality measurements based on sounding reference signals and demodulation reference signals
A first communication node communicates by multiple-input-multiple-output (mimo) wireless communications with a second communication node of a wireless communication system. The method includes receiving a sounding reference signal (srs) over a plurality of subcarriers transmitted by the second communication node for mimo communications.
03/27/14
20140086167
 Method and apparatus for transmitting a sounding reference signal by a terminal patent thumbnailMethod and apparatus for transmitting a sounding reference signal by a terminal
Provided is a method for transmitting a sounding reference signal by a terminal, and a terminal using the method. The method comprises the following steps: receiving carrier information indicating the carrier via which a sounding reference signal is to be transmitted; receiving a physical downlink shared channel (pdsch) through a first downlink component carrier; and transmitting a sounding reference signal through a second downlink component carrier, wherein the second downlink component carrier is determined based on the carrier information..
03/20/14
20140079151
Method for transmitting sounding reference signal in multiple antenna wireless communication system and apparatus therefor
A method for transmitting a sounding reference signal from a user equipment in a mimo antenna wireless communication system. The method includes receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value nsrscs and an initial transmissioncomb parameter value ktc; setting an interval between cyclic shift values corresponding to each antenna port based on the initial cyclic shift value, to reach a maximum interval; setting a transmissioncomb parameter value corresponding to a specific one of the antenna ports to a value different from the initial transmissioncomb parameter value if the initial cyclic shift value is a previously set value and the number of antenna ports is 4; and transmitting the sounding reference signal to the base station through each antenna port by using the set cyclic shift value and transmissioncomb parameter value..
03/20/14
20140079001
Method for transmitting sounding reference signal in multiple antenna wireless communication system and apparatus therefor
A method for transmitting a sounding reference signal from a user equipment in a mimo antenna wireless communication system. The method includes receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value nsrscs and an initial transmissioncomb parameter value ktc; setting an interval between cyclic shift values corresponding to each antenna port based on the initial cyclic shift value, to reach a maximum interval; setting a transmissioncomb parameter value corresponding to a specific one of the antenna ports to a value different from the initial transmissioncomb parameter value if the initial cyclic shift value is a previously set value and the number of antenna ports is 4; and transmitting the sounding reference signal to the base station through each antenna port by using the set cyclic shift value and transmissioncomb parameter value..
03/20/14
20140078942
Transmitting and receiving uplink control channel
The disclosure is related to transmitting a control channel, multiplexing an uplink control channel, and multiplexing a sounding reference signal for user equipment configured with carrier aggregation.. .
03/13/14
20140071922
Method and apparatus for configuring a sounding reference signal for a segment carrier
Methods, apparatus and computer program products configure a sounding reference signal (srs) for a segment carrier that serves as a contiguous bandwidth extension of a component carrier, such as a component carrier that is backwards compatible with prior releases of a mobile terminal. In the context of a mobile terminal, the method receives a triggering message that identifies respective configurations of the srs for the component carrier and the associated segment carrier.
03/06/14
20140064218
Method of transmitting sounding reference signal
A method of transmitting a sounding reference signal (srs) includes receiving srs operation information including a sounding indicator, the sounding indicator indicating whether srs transmission takes place at a subframe; generating the srs according to the srs operation information, and if the sounding indicator indicates occurrence of srs transmission, transmitting the srs at the subframe. Multiplexing can be achieved without collision between data and a sounding reference signal and single carrier characteristics required in uplink transmission can be preserved..
03/06/14
20140064213
Feedback capability enhancement using reference symbol radio resource selection
Feedback information is conveyed between a wireless device and a base station in a cellular communications network via selection and detection of radio resources utilized for an uplink reference signal transmitted from a wireless device to a base station. In this manner, additional feedback information may be sent from the wireless device to the base station without sacrificing any bandwidth available for data transfer between the wireless device and the base station.
02/27/14
20140056271
Method for transmitting uplink and wireless device using same
Provided are a method for transmitting an uplink and a wireless device. The wireless device decides a first wireless resource through which a sounding reference signal (srs) will be transmitted from a first serving cell, and decides a second wireless resource through which an uplink channel will be transmitted from a second service cell.
02/20/14
20140050182
Terminal apparatus, base station apparatus, transmission method and reception method
Provided is a terminal apparatus in which, a transmission control unit (204) controls the transmission power of a sounding reference signal (srs) by use of an offset value relative to the transmission power of a data signal, and a transmission unit (206) transmits the srs by use of the transmission power as controlled. If a subframe to be used for transmitting the srs is a predetermined subframe, the transmission control unit (204) uses a first offset value to control the transmission power of the srs.
02/06/14
20140036880
Method and apparatus to provide a-periodic sounding reference signal
In accordance with the exemplary embodiments, there is at least a method and an apparatus, the apparatus including computer program code executed by at least one processor to cause the apparatus to perform the method including operating an apparatus to detect an occurrence of at least one trigger condition, where the occurrence of the at least one trigger condition is indicative at least of user equipment having data buffered for an uplink transmission, and in response to the detection of the occurrence of the at least one trigger condition, transmitting an a-periodic sounding reference symbol to a network access node.. .
02/06/14
20140036859
Methods to increase sounding capacity for lte-advanced systems
This invention is a method of wireless communication between a base station and at least one user equipment. The base station signals a user equipment to produce a burst of a number of sounding reference signals having a predetermined burst duration.
02/06/14
20140036809
Method and apparatus for sounding reference signal triggering and power control for coordinated multi-point operations
Certain aspects of the present disclosure provide methods and apparatus for sounding reference signal (srs) triggering and power control for coordinated multi-point (comp) operations. One method generally includes maintaining separate power control processes for at least a first aperiodic srs (a-srs) and a second a-srs, receiving, in a first subframe, a downlink transmission triggering transmission of at least one of the first and second a-srs in a subsequent subframe, identifying which of the first and second a-srs to transmit in the subsequent subframe, receiving a first power control command that indicates a power control value to apply to the identified a-srs, and transmitting the identified a-srs based in accordance with the first power control command..
01/30/14
20140029569
Method for allocating multi-ues' sounding reference signal (srs) uplink resources and enb
The present invention is to provide a method for allocating multi-ues' sounding reference signal (srs) uplink resources, and an enb for allocating multi-ues' srs uplink resources with the method. The method may automatically and dynamically allocate multi-ues' srs resource in both the time domain resource and the frequency domain resource in accordance with system capacity attribute value and configured srs transmission period.
01/16/14
20140016620
Methods and apparatus for transmission of uplink sounding reference signals in a communication system with large number of antennas
Methods for preventing timing collisions in a wireless communication network include transmitting a data uplink symbol of normal duration via a first base pair using a first timing advance (ta) corresponding to the first base pair. Scheduling to transmit a second uplink symbol via a second base pair (bp) corresponding to the transmit rf chain.
01/16/14
20140016602
Apparatus and method for supporting transmission of sounding reference signals from multiple antennas
Methods and apparatuses, through the use of a downlink control indication (dci) format or through higher layer signaling, for dynamic activation and deactivation of sounding reference signal (srs) transmissions from user equipments (ues) in an ul component carrier (cc) with configured srs transmissions, the dynamic configuration of srs transmissions parameters, the dynamic activation and configuration of srs transmissions in an ul cc without previously configured srs transmissions for a reference ue, and the configuration of srs transmissions from multiple ue transmitter antennas.. .
01/16/14
20140016576
Controlling transmit power of uplink sounding reference signal
The disclosure is related to controlling a transmit power of an uplink sounding reference signal.. .
01/16/14
20140016475
Method and device for resolving collision between aperiodic srs and uplink control signaling
The present invention provides a method and device for resolving a collision between an aperiodic sounding reference signal (srs) and an uplink control signaling. The method includes: acquiring priority criteria of the aperiodic srs and the uplink control signaling of a ue; receiving, by the ue, a downlink control signaling transmitted by a base station, and acquiring a time when a transmission of the aperiodic srs is needed; if a transmission of the uplink control signaling through a physical uplink control channel (pucch) is needed at the time when the transmission of the aperiodic srs is needed, transmitting, by the ue, the aperiodic srs or the uplink control signaling with a higher priority at the time according to the acquired priority criteria; if the transmission of the uplink control signaling through the pucch is not needed at the time, transmitting the aperiodic srs at the time..
01/02/14
20140003262
Sounding reference signal (srs) mechanism for intracell device-to-device (d2d) communication
Technology for device discovery using a device-to-device (d2d) sounding reference signal (srs) and device discovery using d2d srs in a channel measurement group (cmg) is disclosed. In an example, a user equipment (ue) configured for device discovery via a node using the d2d srs can include a transceiver module.
12/26/13
20130343359
Method and apparatus for transmitting srs in lte tdd system
A method and apparatus are provided for transmitting an uplink sounding reference signal (srs) by a user equipment (ue). The method includes receiving information related to an srs period and an offset for an srs transmission; generating the uplink srs; and when the information indicates the srs period is 2 ms, transmitting the srs in two single carrier frequency division multiple access (scfdma) symbols in a half frame according to the offset for the srs transmission.
12/19/13
20130337822
Locating and tracking user equipment in the rf beam areas of an lte wireless system employing agile beam forming techniques
In embodiments of the present disclosure improved capabilities are described for increasing the bandwidth in a large area broadband network, where a scheduler facility, in association with a cellular lte base transceiver station utilizing an agile beam forming antenna system, schedules communications between the lte base transceiver station and mobile transceiver devices, wherein the scheduler facility schedules communications with a target mobile transceiver device to take place in one of the m times n rf beams of the agile beam forming antenna system based on a location determination of the target mobile transceiver device within the cell coverage area determined through a location determination algorithm that utilizes at least one of a channel quality indicator (cqi) measurement and a sounding reference signal (srs) measurement collected through a communicative interaction between the cellular lte base transceiver station and the target mobile transceiver device.. .
12/19/13
20130336226
Method and device for transmitting data in wireless communication system
Provided are a method and a device for transmitting wireless communication data. A terminal transmits a channel quality indicator (cqi) to a base station through a physical uplink control channel (pucch) which is allocated within a sounding reference signal (srs) subframe that is determined in a ue-specific manner, and transmits uplink (ul) data through a physical uplink shared channel (pusch) which is allocated within said srs subframe.
12/12/13
20130329675
Sounding reference signal transmission
A first transmission of sounding reference signals is on a first cell of a first cell group in parallel with transmission of at least one of a first random access preamble in a second cell group, and a first uplink packet on a second cell. The wireless device drops a second transmission of sounding reference signals in a symbol of the first cell if at least one of the following conditions is satisfied: a second random access preamble is transmitted overlapping the symbol in the first cell group, and a second uplink packet is transmitted overlapping the symbol in the first cell..
12/12/13
20130329660
Transmission of uplink sounding reference signal
The disclosure is related to transmission of a sounding reference signal (srs) being independent of or separated from an uplink channel.. .
12/05/13
20130322280
Uplink channel sounding and channel state information estimation in mobile communication systems with multiple antennas
A system includes a base station configured to communicate with a plurality of mobile stations. The base station transmits downlink timing synchronization and establishes frequency synchronization with at least one of the plurality of mobile stations.
12/05/13
20130322277
Measurements and interference avoidance for device-to-device links
Disclosed herein are measurement and interference avoidance for direct device-to-device (d2d) links. A method may be implemented by a wireless transmit/receive unit (wtru).
11/14/13
20130301564
Interaction of sounding reference signals with uplink channels for coordinated multi-point operations
Certain aspects of the present disclosure provide methods and apparatus for facilitating interaction of sounding reference signals (srs) with uplink channels, while supporting coordinated multipoint (comp) transmission/reception operations. One method generally includes receiving, from one or more nodes participating in the comp operations with a user equipment (ue), signaling indicating at least one of cell-specific srs configurations or formats for uplink channels, and determining based, at least in part upon the signaling, whether at least one last symbol of a subframe is available for transmitting one or more of the uplink channels from the ue..
11/07/13
20130294400
Method and apparatus for triggering and transmitting uplink sounding reference signal
Embodiments of the present invention disclose methods and apparatuses for dynamically triggering an uplink sounding reference signal for a carrier aggregation system, methods and apparatus for transmitting an uplink sounding reference signal for a carrier aggregation system. One embodiment discloses a method for dynamically configuring an uplink sounding reference signal for a carrier aggregation system, wherein an uplink schedule in the system comprises an srs request field.
11/07/13
20130294282
Method and apparatus for transmitting an uplink signal by a relay in a wireless communcation system
The present invention relates to a wireless communication system, and to a method and apparatus for transceiving an uplink signal by a relay in a wireless communication system. According to the present invention, a scheme, in which the relay may correctly determine a reference resource for channel state information (csi) calculation, and thus may perform accurate csi transmission, may be provided.
10/31/13
20130286994
Method of configuring an aperiodic sounding reference signal
The present invention relates to a method of configuring an aperiodic sounding reference signal. In an embodiment of the method of configuring an aperiodic sounding reference signal, the parameters of the aperiodic sounding reference signal are categorized into two parts.
10/31/13
20130286987
Sounding reference signal
A wireless device receives rrc message(s) configuring transmissions of sounding reference signals on a second carrier in a second carrier group. The wireless device receives a random access response comprising a timing advance command.
10/31/13
20130286904
Methods and apparatus for tdd reconfiguration
Transmission of control data by a user equipment (ue) in circumstances following a tdd subframe reconfiguration from an evolved node b (enb) may result in a conflict with a scheduled transmission of the control data. In one example, a ue may modify periodicity, content, priority, or other aspects of channel state information (csi) or sounding reference signals (srs) to resolve any conflicts resulting from a tdd subframe reconfiguration and to ensure transmission of the csi or srs.
10/24/13
20130279626
Method for transmitting sounding reference signal in multiple antenna wireless communication system and apparatus therefor
A method for transmitting a sounding reference signal from a user equipment in a mimo antenna wireless communication system is disclosed. The method comprises receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value nsrscs and an initial transmissioncomb parameter value ktc; setting an interval between cyclic shift values corresponding to each antenna port based on the initial cyclic shift value, to reach a maximum interval; setting a transmissioncomb parameter value corresponding to a specific one of the antenna ports to a value different from the initial transmissioncomb parameter value if the initial cyclic shift value is a previously set value and the number of antenna ports is 4; and transmitting the sounding reference signal to the base station through each antenna port by using the set cyclic shift value and transmissioncomb parameter value..
10/24/13
20130279434
Sounding signal in a multicarrier wireless device
A wireless device receives message(s) configuring cell groups and transmissions of sounding reference signals. N sounding reference signals are configured to be transmitted in a subframe (n>1).
10/24/13
20130279364
Radio relay station apparatus, radio base station apparatus and radio communication method
Provided are a radio relay station apparatus, a radio base station apparatus and a radio communication method capable of improving user throughput and increasing the capacity in type ii relay. The radio communication method of the present invention is characterized by, in a radio relay station apparatus, measuring channel quality of relay links with use of sounding reference signals from mobile terminal apparatuses; and transmitting feedback information including measurement results of channel quality of the relay links to a radio base station apparatus via a backhaul link; in the radio base station apparatus, measuring channel quality of direct links with use of sounding reference signals from the mobile terminal apparatuses, subtracting a correction value from the measurement results of the radio relay station apparatus; and allocating radio resources to a mobile terminal apparatus based on measurement results of the channel quality of the direct links and subtraction results..
10/17/13
20130272230
Uplink transmission power in a multicarrier wireless device
A wireless device receives a message indicating transmission of a sounding reference signal in a symbol on subframe n on a first cell in a first cell group. The symbol overlaps in time with transmission of a packet on at least one of: subframe n and n+1 in a second cell in a second cell group.
10/17/13
20130272170
Adaptive ul-dl tdd configurations in a heterogneous network
Technology for adapting uplink-downlink (ul-dl) time-division duplexing (tdd) subframe configurations in a heterogeneous network (hetnet) is disclosed. One method can include a reference enhanced node b (enb) determining a preferred adaptive ul-dl configuration.
10/10/13
20130265978
Method and apparatus for transmitting aperiodic sounding reference signal in wireless communication system
Provided is a method for transmitting an aperiodic sounding reference signal (srs) in a wireless communication system. A terminal receives an srs parameter, which indicates the number of antennas for transmitting the aperiodic srs, by means of a physical downlink control channel (pdcch), and transmits the aperiodic srs to the base station using at least one antenna which belongs to the number of antennas for transmitting the apeirodic srs..
10/10/13
20130265977
Method and apparatus for transmitting aperiodic sounding reference signal in wireless communication system
Provided are a method and an apparatus for transmitting an aperiodic sounding reference signal (srs) in a wireless communication system. A terminal receives from a base station a triggering signal for triggering the transmission of the aperiodic srs and the number of transmissions of the aperiodic srs, and transmits the aperiodic srs to the base station the number of times equal to the number of transmissions, using a plurality of subframes, on the basis of the triggering signal..
10/10/13
20130265962
Mobile station apparatus, base station apparatus, method and integrated circuit
To provide a mobile station apparatus, a base station apparatus, a method and an integrated circuit which are capable of dissolving complexity of setting by the base station apparatus and performing efficient scheduling by improving the orthogonality of resources of a reference signal for every antenna. A mobile station apparatus which transmits a sounding reference signal to a base station apparatus using a plurality of antenna ports, wherein based on one value set specifically to a mobile station apparatus by a parameter notified of by a higher layer from the base station apparatus, a cyclic shift applied to a sounding reference signal corresponding to the plurality of antenna ports is determined..
09/26/13
20130250929
Uplink sounding transmission with carrier aggregation
A wireless device receives message(s) configuring transmissions of sounding reference signals on a secondary cell in a secondary cell group. The wireless device receives an activation command to activate the secondary cell.
09/26/13
20130250897
Sounding reference signal transmission
A wireless device transmits a first sounding reference signal on a first cell of a first cell group in parallel with transmission of at least one of a first random access preamble in a second cell group, and a first uplink data packet on a second cell. The wireless device drops a second sounding reference signal in a symbol of the first cell if at least one of the following conditions is satisfied: a second random access preamble is transmitted overlapping the symbol in the first cell group, and a second uplink packet is transmitted overlapping the symbol in the first cell..
09/26/13
20130250893
Method for transmitting sounding reference signal and method and device for indicating configuration
A method for transmitting a sounding reference signal and a method and device for indicating a configuration are provided. A method for indicating a sounding reference signal configuration may include: generating at least two pieces of downlink control signaling dci, where each of the at least two pieces of dci includes a sounding reference signal srs configuration information element; and transmitting the at least two pieces of dci in a subframe to a terminal, so that the srs configuration information elements in the at least two pieces of dci are used to jointly indicate an srs configuration.
09/26/13
20130250847
Method and device for a relay node to transmit a sounding reference signal to a base station in a wireless communication system
The present invention relates to a method for a relay node (rn) to transmit a sounding reference signal (srs) to a base station in a wireless communication system. The method for srs transmission includes: receiving the backhaul downlink subframe setting information from the base station; allocating backhaul uplink subframes on the basis of the received backhaul downlink subframe setting information; receiving uplink subframe setting information; receiving uplink subframe setting information for srs transmission from the base station; receiving an indicator for triggering the srs transmission from the base station; and, if a first uplink subframe from among the uplink subframes for the srs transmission is the backhaul uplink subframe, transmitting the srs from the first uplink subframe to the base station; or, if the first uplink subframe is not the backhaul uplink subframe is not the backhaul uplink subframe, not transmitting the srs to the base station; or transmitting the srs from a second uplink subframe, which is backhaul uplink subframe from among the uplink subframes for the srs transmission and is subsequently the closest to the first uplink subframe, to the base station..
09/19/13
20130242958
Sounding reference signal
A wireless device receives rrc message(s) configuring transmissions of sounding reference signals on a second carrier in a second carrier group. The wireless device receives a random access response comprising a timing advance command.
09/19/13
20130242911
Sounding reference signal transmission in carrier aggregation
A cell-specific sounding reference symbol (srs) subframe configuration and ue-specific srs configuration are defined for carrier aggregation. For the cell-specific srs subframe configuration, the same cell-specific srs subframes are configured for all uplink (ul) carrier components (ccs).
09/19/13
20130242895
Enhanced sounding reference signal (srs) operation
A method of wireless communication includes determining how to handle a collision between the first sounding reference signal (srs) and a second srs when the second srs may the same type as the first srs and when both the first srs and the second srs may be transmitted in a same cell. The method also includes transmitting the first srs and the second srs based on a received first and second configuration for srss.
09/19/13
20130242761
Combining channel quality measurements based on sounding reference signals and demodulation reference signals
A first communication node communicates by multiple-input-multiple-output (mimo) wireless communications with a second communication node of a wireless communication system. The method includes receiving a sounding reference signal (srs) over a plurality of subcarriers transmitted by the second communication node for mimo communications.
09/05/13
20130229989
Resource allocation methods and use thereof for sounding reference signals in uplink
Apparatus, methods, and program products are presented that perform the following: allocating a set of sounding reference signal resources in a sounding reference signal resource space to a plurality of user equipment using a portioning scheme, and signaling indications of the allocated set of sounding reference signal resources to the plurality of user equipment. The portioning scheme may be a load balancing, complete partitioning, or hybrid scheme.
08/29/13
20130223394
Communication device and srs transmission control method
Provided are a communication device and an srs transmission method capable of reducing the possibility of a difference in recognition between the presence or absence of an srs transmission between a base station and a terminal or of an srs resource so as to prevent degradation of system throughput. At a terminal (200), a reception processing unit (203) detects control information indicating whether or not to request transmission of a sounding reference signal (srs), whereupon a transmission signal forming unit (207) transmits an a-srs by way of control by a transmission control unit (206) on the basis of control information.
08/29/13
20130223392
Method and apparatus for adjusting sound reference signal transmission power
Provided are a method and apparatus for adjusting sounding reference signal transmission power. A terminal a plurality of transmit powers used for transmitting a plurality of sounding reference signals (srss) in a sounding reference symbol.
08/29/13
20130223311
Coordinated uplink transmission in lte drx operations for a wireless transmit receive unit
A method and apparatus for discontinuous reception (drx) operation in a wireless transmit receive unit aligns uplink and downlink transmissions with a drx cycle. The transmission may be a channel quality indicator report, a sounding reference signal, or a silence descriptor among other downlink and uplink transmissions..
08/22/13
20130215838
Mobile communication system, base station apparatus, mobile station apparatus and communication method
Based on a sounding reference signal, a base station apparatus performs efficient scheduling. The base station apparatus includes information for requesting the transmission of the sounding reference signal in a first downlink control information format or a second downlink control information format, and transmits the information to the mobile station apparatus, the mobile station apparatus transmits, based on detection of the information, the sounding reference signal to the base station apparatus, and a first parameter used for the transmission of the sounding reference signal based on the detection of the information included in the first downlink control information format and a second parameter used for the transmission of the sounding reference signal based on the detection of the information included in the second downlink control information format are individually set by a signal of a higher layer transmitted from the base station apparatus..
08/15/13
20130208773
Method for transmitting sounding reference signal in multiple antenna wireless communication system and apparatus therefor
A method for transmitting a sounding reference signal from a user equipment in a mimo antenna wireless communication system is disclosed. The method comprises receiving sounding reference signal setup information from a base station, the sounding reference signal setup information including an initial cyclic shift value nsrscs and an initial transmissioncomb parameter value ktc; setting an interval between cyclic shift values corresponding to each antenna port based on the initial cyclic shift value, to reach a maximum interval; setting a transmissioncomb parameter value corresponding to a specific one of the antenna ports to a value different from the initial transmissioncomb parameter value if the initial cyclic shift value is a previously set value and the number of antenna ports is 4; and transmitting the sounding reference signal to the base station through each antenna port by using the set cyclic shift value and transmissioncomb parameter value..
08/15/13
20130208710
Method and apparatus for transmitting a sounding reference signal
Provided are a method and apparatus for transmitting a sounding reference signal. A terminal receives, from a base station, a configuration for periodic channel quality indicator (cqi) transmission and a configuration for sound reference signal (srs) transmission.
08/08/13
20130201971
Transmission method and apparatus for non-periodic sounding reference signal(srs)
The present invention discloses a transmission method and apparatus for non-periodic srs. Enb configures time-domain configuration parameter of non-periodic srs through higher layer signalling or downlink physical control channel signalling; terminal equipment transmits non-periodic srs in indicated time-domain resource.
08/08/13
20130201941
Method, base station and user equipment for sending and receiving sounding reference signal
A method for sending and receiving a sounding reference signal (srs) is provided. The method includes: receiving, by a user equipment (ue), a control signaling from a base station (bs), wherein a first field in the control signaling indicates the ue transmitting data or sending the srs, a second field in the control signaling indicates a frequency-hopping mode for the ue transmitting the data or sending the srs, and a third field in the control signaling indicates frequency-band information for the ue transmitting the data or sending the srs; and sending, by the ue, the srs, on a frequency-band according to the frequency-band information indicated by the third field, through the frequency-hopping mode indicated by the second field, when the first field indicates the ue sending the srs..
08/01/13
20130195084
Physical layer issues related to multi-ta group support
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may determine a number of uplink timing groups configured for a plurality of component carriers, and determine whether to transmit at least one of data or control information on one or more first component carriers of the plurality of component carriers concurrently with sounding reference signals (srs) on one or more second component carriers of the plurality of component carriers based at least in part on the number of uplink timing groups.
08/01/13
20130195028
Sounding reference signal enhancement to support uplink coordinated multipoint
Systems and techniques for sounding reference signal enhancement to support uplink coordinated multipoint are described herein. A sounding reference signal may be assigned to a user equipment based on a relationship between the user equipment and a cell edge of a cell served by a wireless network device and serving the user equipment..
08/01/13
20130195025
Uplink coordinated multi-point
Disclosed embodiments may include an apparatus having one or more processors coupled to one or more computer-readable storage media. The one or more processors may be configured to transmit and/or receive channel state information reference signal (csi-rs) resource configuration information, demodulation reference signals (dm-rs), uplink sounding reference signals (srs), and power control parameters to support uplink coordinated multi-point (comp) operations.
07/25/13
20130189976
Method and apparatus for managing sounding reference signal resource in wireless communication system
A method and an apparatus for managing sounding reference signal (srs) resources in a wireless communication system are provided. A method of a base station for managing srs resources includes receiving an allocation of srs resources from a system controller, allocating srs resources to connected terminals that are connected to the bs, determining a number of residual srs resources varying according to the number of connected terminals, and transmitting one of an additional srs resource allocation request and an allocated srs resource return request to the system controller according to the number of residual srs resources..
07/25/13
20130188619
Secondary cell sounding transmission
A wireless device receives message(s) configuring transmissions of sounding reference signals on a secondary cell in a secondary cell group. The wireless device receives an activation command to activate the secondary cell.
07/25/13
20130188581
Sounding in multicarrier wireless communications
A wireless device transmits one or more sounding reference signals in parallel with transmission of at least one of a first preamble and a first packet. The wireless device is configured to not transmit a first sounding reference signal if at least one of the following conditions is satisfied: a) the first sounding reference signal transmission and a second preamble transmission coincide in the same subframe of the same cell group, b) the wireless device has insufficient power to transmit the first sounding reference signal in parallel with at least one of a third preamble and a second packet..


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Sounding Reference Signal topics: Sounding Reference Signal, Base Station, Communication System, Carrier Aggregation, Srs Transmission, Scheduling, Random Access, Automatic Repeat Request, Radio Resource Control, Downlink Control Information, Radio Communication, Mobile Terminal, Heterogeneous, Heterogeneous Network, Integrated Circuit

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